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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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 * under the License.                                           *
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package com.guavamail.smtp.mailer.dates;

import java.util.Date;

import javax.mail.internet.MailDateFormat;

/**
 * A thread safe wrapper for the <code>javax.mail.internet.MailDateFormat</code>
 * class.
 * 
 */
public class RFC822DateFormat extends SynchronizedDateFormat {
	/**
	 * A static instance of the RFC822DateFormat, used by toString
	 */
	private static RFC822DateFormat instance;

	static {
		instance = new RFC822DateFormat();
	}

	/**
	 * This static method allows us to format RFC822 dates without explicitly
	 * instantiating an RFC822DateFormat object.
	 * 
	 * @return java.lang.String
	 * @param d
	 *            Date
	 * 
	 * @deprecated This method is not necessary and is preserved for API
	 *             backwards compatibility. Users of this class should
	 *             instantiate an instance and use it as they would any other
	 *             DateFormat object.
	 */
	public static String toString(Date d) {
		return instance.format(d);
	}

	/**
	 * Constructor for RFC822DateFormat
	 */
	public RFC822DateFormat() {
		super(new MailDateFormat());
	}
}
